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Forging Defects: Types, Causes and Remedies  April 25, 2017

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GET MORE STUFF Today we will learn about forging defects types, causes and its

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remedies.Defects are common in every manufacturing process

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defects, same as forging consist some defects which are due to

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both process and human limitations. Forging gives better mechanical properties among all manufacturing process but it also includes some common defects which are described below.

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Forging Defects: Types, Causes and Remedies

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1.) Un lled Section: As the name implies in this type of defect some of the forging section remain un lled.  This is due to poor design of die or poor forging technic. This is also due to less raw material or poor heating. This defect can be removed by proper die design, proper availability of raw material and proper heating.

2.) Cold Shut:

Cold shut includes small cracks at corners. These defects occur due to improper design of forging die. It is also due to sharp

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corner, and excessive chilling in forge product. The llet radius of the die should be increase to remove these defects.

3.) Scale Pits:

Scale pits are due to improper cleaning of forged surface. This defect generally associated with forging in open environment. It is irregular deputations  on the surface of forging. It can be removed by proper cleaning of forged surface.

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4.) Die Shift:

Die shift is caused by misalignment of upper die and lower die. When both these dies are not properly aligned the forged product does not get proper dimensions.

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This defect can be removed by proper alignment. It can be done by provide half notch on upper die and half on lower die so at the time of alignment, both these notches will matched.

5.) Flakes:

These are internal cracks occur due to improper cooling of

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forge product. When the forge product cooled quickly, these

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cracks generally occur which can reduced the strength of forge product. This defect can be removed by proper cooling.

6.) Improper Grain Growth: This defect occurs due to improper

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which changes prede ne grain structure of product.  It can be removed by proper die design

7.) Incomplete Penetration:

Forging

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This defect arises due to incomplete forging. it is due to light or

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rapid hammer blow. This defect can be removed by proper

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control on forging press.

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8.) Surface Cracking: Surface cracking occurs due to exercise working on surfaces at low temperature. In this defect, So many cracks arise on work piece. This defect can be removed by proper control on working temperature.

9.) Residual Forging:

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This defect occurs due to improper cooling of forged part. Too much rapid cooling is main causes of this type of defects. This

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can be removed by slow cooling of forged part.  

These are all main types of forging defects. If you have any query regarding this article, ask by commenting. If you like this article, don’t forget to share it on social networks. Subscribe our website for more interesting articles. Thanks for reading it.

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2 thoughts on “Forging Defects: Types, Causes and Remedies”  B.K.Gupta  January 31, 2019 at 8:41 am  Permalink

Please explain detail forging defects

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 Sushant  February 16, 2019 at 2:52 am  Permalink

What are the die design factor casusing cold shut

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